Actually, it's a CPU demo -- the CAD program Chuck used to design and simulate that CPU runs under emulation on itself, so there's a GUI demo already. The only interesting thing about that page is that it's an actual CPU, rather than an emulation, so all that's theoretically needed is a completely working chip and (probably) some additional RAM to run the full CAD that designed it.

And anyhow, it's rather OBE, since the full emulation of the currently prototyped and shipping-as-a-USB-gadget 24-core SEAFORTH system is downloadable from Intellasys' website.

Is it really completely async? I thought the cores were clocked. But yes, the overall basic idea is async, and any processor can suspend in almost zero power while waiting for a result or instruction to be fed to it from another processor (wherupon it'll resume very, very quickly).